ajantha-bhat commented on code in PR #6582:
URL: https://github.com/apache/iceberg/pull/6582#discussion_r1073335902
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core/src/main/java/org/apache/iceberg/puffin/StandardBlobTypes.java:
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@@ -26,4 +26,6 @@ private StandardBlobTypes() {}
* href="https://datasketches.apache.org/";>Apache DataSketches</a> library
*/
public static final String APACHE_DATASKETCHES_THETA_V1 =
"apache-datasketches-theta-v1";
+
+ public static final String NDV_BLOB = "ndv-blob";
Review Comment:
I think https://github.com/apache/iceberg/pull/1985
https://github.com/apache/iceberg/issues/1832
https://github.com/apache/iceberg/issues/1833 are super old. We are discussing
partition stats in the below proposal now a days.
https://docs.google.com/document/d/1vaufuD47kMijz97LxM67X8OX-W2Wq7nmlz3jRo8J5Qk/edit?usp=sharing
**In this proposal, we are planning to store partition-level NDV stats also
in a puffin file.** So, each partition will have one puffin file. These puffin
file's location will become a cell in a row along with file count, row count in
a general table-level statistics file (something like an index file) stored as
sorted avro or parquet for every snapshot.
So, I am also interested to use the same CALL procedure to collect
partition-level stats too (with a different argument).
Or maybe we need to step back and design some generic interfaces that can
work for table level, partition level and even file level stats.
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